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Regulating BP/Flow

Peripheral Mechanisms - Chemical Control

What are the 4 methods of Chemical Control which regulate BP/Flow? 1. Co2; 2. Epinephrine; 3. Histamine; 4. pH
How does CO2 exert chemical control over BP/Flow? 1. direct DILATING action on most Arterioles; 2. helps maintain normal activity of CVC
What effect does Epinphrine have on ß1-adrenergic Receptors? DEPOLARIZES --> increased HR
What effect does Epinphrine have on ß2-adrenergic Receptors? HYPERPOLARIZES Skeletal and Coronary Arterioles --> decreased PR --> decreased BF
What effect does Epinphrine have on alpha-adrenergic Receptors? DEPOLARIZES Cutaneous, Renal, and GI Arterioles --> increased PR --> decreased BF
Hoe does Histamine enter the Circulatory System? released from Tissues under Trauma or Allergic reaction
What effect does Histamine have on BP/Flow? GENERALIZED Vasodilation and INCREASED Capillary premeability
What effect does Histamine have on the Inspiratory Center? Bronchiole CONSTRICTION
How does Histamin effect BP/Flow? DECREASE Venous return --> decrease BP --> pass out
How does pH effect BP/Flow? decrease O2 --> increase acidity --> contribute to dilation
Created by: Kristel